INPUT SEQUENCE=XXX

##</code><code>##

______________________________________________________________________
+___________________________________

##</code><code>##

#!/usr/bin/perl

use strict;
use warnings;
use Tie::File;

my ($file,$recs_X_file) = @ARGV;
die "Usage: $0 <input_file> <recs x file>" if (@ARGV != 2);
tie my @arr, 'Tie::File', $file, recsep => "_________________________________________________________________________________________________________",autochomp=>0;

my $from=0;
my $to=$recs_X_file-1;
while ($from < $#arr){
  my $ofile = "file.$from-$to";
  open F,">",$ofile or die $!;
  print "printing records $from to $to in $ofile\n";
  print F @arr[$from..$to];
  $from=$to+1;
  $to = $from+$recs_X_file-1;
}

##</code><code>##

perl split_records.pl inputfile 10

##</code><code>##

printing records 0 to 9 in file.0-9
printing records 10 to 19 in file.10-19
printing records 20 to 29 in file.20-29
... and so on (depending on the number of records of the original file